中文摘要：

这研究从加拿大和在实验室条件下面种的本地商业股票(D) 描述在最新介绍的海湾扇贝股票(W) 之间的完全的 diallel 杂交，在中国。幼虫的幸存和生长在混血儿之中在所有生活阶段(幼虫，争论，和成年人) 期间被比较(DW， WD ) 并且纯种(DD， WW ) 人口。重要杂种优势在幼虫的阶段期间为幸存被检测(>1% 中间父母的价值) 。吝啬的杂种优势(H m ) 在整个寿命在生长变化了。超过 50% H m 价值分别地在 DW 和 WD 组积极、否定。为所有生活阶段的生长上的母亲的效果和交配类型(intrapopulation 对 interpopulation 十字) 的影响不是一致的。幼虫的幸存没显著地不同(P > 0.05 ) 与母亲的效果或交配类型。在收获阶段，轰炸长度(SL ) ，壳高度(嘘) ，壳宽度(SW ) ，和全部的重量(TW ) 与生来的组相比在混血儿是更大的。积极 H m 价值被观察在 SL (1.5%) ， SW (5.8%) ，和 TW (12.3%) ，并且在 DW 组(6.1% ， 4.5% ， 6.8% ，和 27.2%) 是更重要的。这些结果建议在二张地理人口之间的杂交是为改进海湾扇贝生长的一个好工具。然而，在二张人口之间的不稳定的杂种优势要求进一步的学习。

英文摘要：

This study describes the complete diaUel hybridization between newly introduced bay scallop stock （W） from Canada and local commercial stock （D） grown under laboratory conditions, in China. Larval survival and growth during all life stages （larvae, spat, and adult） were compared among hybrid （DW, WD） and purebred （DD, WW） populations. Significant heterosis was detected for survival during the larval stage （〉 1% of the mid-parent values）. The mean heterosis （Hm） varied in growth throughout the life span. More than 50% of the Hm values were positive and negative in the DW and WD groups, respectively. The influence of maternal effects and mating types （intrapopulation vs. interpopulation crosses） on growth for all life stages was not consistent. Larval survival did not differ significantly （P〉0.05） with maternal effect or mating type. In the harvest stage, shell length （SL）, shell height （SH）, shell width （SW）, and total weight （TW） were larger in the hybrid compared with the inbred groups. Positive Hm values were observed in SL （1.5%）, SW （5.8%）, and TW （12.3%）, and were more significant in the DW groups （6.1%, 4.5%, 6.8%, and 27.2%）. These results suggest that hybridization between two geographic populations is a good tool for improving bay scallop growth. However, unstable heterosis between the two populations requires further study.